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Acid Halides to Esters: Alcoholysis

Acid Halides to Esters: Alcoholysis

Alcoholysis is a nucleophilic acyl substitution reaction in which an alcohol functions as a nucleophile. Acid halides react with alcohol to produce esters. The mechanism proceeds in three steps:

Esters to β-Ketoesters: Claisen Condensation Overview

Esters to β-Ketoesters: Claisen Condensation Overview

Regular Claisen condensation is a base-promoted reaction involving identical esters with two α hydrogens, condensing to produce β-ketoesters. It is a nucleophilic acyl substitution reaction wherein one of the ester molecules, upon deprotonation by the base, forms a nucleophilic enolate ion, while the other molecule serves as an electrophile.

Nomenclature of Carboxylic Acid Derivatives: Acid Halides, Esters, and Acid Anhydrides

Nomenclature of Carboxylic Acid Derivatives: Acid Halides, Esters, and Acid Anhydrides

Naming Acid Halides
The IUPAC and common names of acid halides are derived from the corresponding carboxylic acids, by changing “ic acid” to “yl halide.” For example, as shown below, the IUPAC name ethanoyl chloride is derived from ethanoic acid, and the common name, acetyl chloride, is obtained from acetic acid.

Esters to β-Ketoesters: Claisen Condensation Mechanism

Esters to β-Ketoesters: Claisen Condensation Mechanism

Regular Claisen condensation involves the synthesis of β-ketoesters by combining identical ester molecules bearing two α hydrogens in the presence of an alkoxide base. The reaction commences with the deprotonation of the acidic α hydrogen by the base to form a resonance stabilized ester enolate. This nucleophilic ion then attacks the carbonyl center of another ester molecule to generate a tetrahedral alkoxide intermediate. Next, the expulsion of the alkoxide group from the intermediate restores...

Alkylation of β-Diester Enolates: Malonic Ester Synthesis

Alkylation of β-Diester Enolates: Malonic Ester Synthesis

Malonic ester synthesis is a method to obtain α substituted carboxylic acids from ꞵ-diesters such as diethyl malonate and alkyl halides.

Acid Halides to Ketones: Gilman Reagent

Acid Halides to Ketones: Gilman Reagent

Lithium dialkyl cuprate, also known as Gilman reagents, selectively reduces acid halides to ketones. The acid chloride is treated with Gilman reagent at −78 °C in the presence of ether solution to produce a ketone in good yield.
As shown below, the mechanism proceeds in two steps. First, one of the alkyl groups of the reagent acts as a nucleophile and attacks the acyl carbon of the acid chloride to form a tetrahedral intermediate. This is followed by the reformation of the carbon–oxygen double...

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Synthesis of Esters Via a Greener Steglich Esterification in Acetonitrile

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Glycine ethyl ester hydro-chloride.

Yong-Jun He¹, Pei Zou, Hong-Yong Wang

¹Jiangsu Institute of Nuclear Medicine, Wuxi 214063, People's Republic of China.

Acta Crystallographica. Section E, Structure Reports Online

|May 19, 2011

Summary

The crystal structure of 3-ethoxy-3-oxopropan-1-aminium chloride reveals strong intermolecular hydrogen bonds. These interactions form a two-dimensional network in the crystal lattice.

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Area of Science:

Crystallography
Supramolecular Chemistry
Organic Chemistry

Background:

Understanding the intermolecular forces that govern crystal packing is crucial in materials science and drug design.
Hydrogen bonding plays a significant role in the self-assembly of molecules and the formation of extended structures.
The specific interactions involving organic cations and halide anions are of interest for developing new functional materials.

Purpose of the Study:

To determine the crystal structure of 3-ethoxy-3-oxopropan-1-aminium chloride.
To identify and analyze the intermolecular interactions present in the crystal lattice.
To elucidate the formation of supramolecular architecture driven by these interactions.

Main Methods:

Single-crystal X-ray diffraction was employed to obtain the precise atomic arrangement.
Analysis of the crystal structure involved identifying hydrogen bond donors and acceptors.
Intermolecular interactions were characterized using crystallographic software and visualization tools.

Main Results:

The crystal structure of 3-ethoxy-3-oxopropan-1-aminium chloride was successfully determined.
Strong intermolecular hydrogen bonds, including N-H⋯Cl, C-H⋯Cl, and C-H⋯O interactions, were observed.
These interactions link the organic cations and chloride anions, leading to the formation of a 2D supramolecular network in the ab plane.

Conclusions:

The crystal structure highlights the significant role of hydrogen bonding in organizing organic cations and anions.
The observed 2D supramolecular network provides insights into crystal engineering principles.
This study contributes to the understanding of structure-property relationships in ionic organic compounds.